CVE-2026-23740
What it is
Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, when ast_coredumper writes its gdb init and output files to a directory that is world-writable (for example /tmp), an attacker with write permission(which is all users on a linux system) to that directory can cause root to execute arbitrary commands or overwrite arbitrary files by controlling the gdb init file and output paths. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.
At a glance
- Exploitability
- Can be exploited locally on the machine without logging in, but needs a user to act. Limited direct impact.
- Exploit odds
- 0.1% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.1% in the next 30 days (EPSS).
- Severity: 0.0 NONE (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.1% · EPSS, next 30 days
- Weakness
- CWE-427
- Record status
- Analyzed
Affected
- Sangoma Certified Asterisk 13.13.0
- Sangoma Certified Asterisk 16.8
- Sangoma Certified Asterisk 16.8.0
- Sangoma Certified Asterisk 18.9
- Sangoma Certified Asterisk 20.7
- Sangoma Asterisk < 20.18.2
- Sangoma Asterisk < 21.12.1
- Sangoma Asterisk < 22.8.2
Attack profile CVSS 3.1 · 0.0
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- None
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-23740.md and follow it. Check whether this project is affected by CVE-2026-23740. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
